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Multiply:
$(0.8a - 0.5b)$ by $(1.5a-3b)$
To do:
We have to multiply $(0.8a - 0.5b)$ by $(1.5a-3b)$
Solution:
We know that,
$(a+b)\times(c+d)=a(c+d)+b(c+d)$
Therefore,
$(0.8a - 0.5b)\times(1.5a-3b)=0.8a (1.5a - 3b) - 0.5b (1.5a -3b)$
$= 1.2a^2 - 2.4ab - 0.75ab + 1.5b^2$
$= 1.2a^2-3.15ab+ 1.5b^2$
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